Commit 7a28fe3c authored by Lars-Peter Clausen's avatar Lars-Peter Clausen Committed by Jonathan Cameron
Browse files

staging:iio:ad7476: Squash driver into a single file. 



After the recent cleanups the buffer support is just a single 23 line function.
This does not really justify a file on its own, so move it to the main driver
file. And with only one source file left the header file containing the device
state struct becomes superflousious so move the content of the header
file to the main driver source file as well.

Signed-off-by: default avatarLars-Peter Clausen <lars@metafoo.de>
Signed-off-by: default avatarJonathan Cameron <jic23@kernel.org>
parent cb093e44

drivers/staging/iio/adc/Makefile

+0 −2
Original line number Diff line number Diff line
@@ -17,8 +17,6 @@ ad799x-y := ad799x_core.o 
ad799x-$(CONFIG_AD799X_RING_BUFFER) += ad799x_ring.o

obj-$(CONFIG_AD799X) += ad799x.o



ad7476-y := ad7476_core.o

ad7476-$(CONFIG_IIO_BUFFER) += ad7476_ring.o

obj-$(CONFIG_AD7476) += ad7476.o



ad7887-y := ad7887_core.o

drivers/staging/iio/adc/ad7476_core.c→drivers/staging/iio/adc/ad7476.c

+59 −4
Original line number Diff line number Diff line
@@ -18,8 +18,62 @@ 
#include <linux/iio/iio.h>

#include <linux/iio/sysfs.h>

#include <linux/iio/buffer.h>

#include <linux/iio/trigger_consumer.h>

#include <linux/iio/triggered_buffer.h>



#include "ad7476.h"

#define RES_MASK(bits)	((1 << (bits)) - 1)



struct ad7476_chip_info {

	unsigned int			int_vref_uv;

	struct iio_chan_spec		channel[2];

};



struct ad7476_state {

	struct spi_device		*spi;

	const struct ad7476_chip_info	*chip_info;

	struct regulator		*reg;

	struct spi_transfer		xfer;

	struct spi_message		msg;

	/*

	 * DMA (thus cache coherency maintenance) requires the

	 * transfer buffers to live in their own cache lines.

	 * Make the buffer large enough for one 16 bit sample and one 64 bit

	 * aligned 64 bit timestamp.

	 */

	unsigned char data[ALIGN(2, sizeof(s64)) + sizeof(s64)]

			____cacheline_aligned;

};



enum ad7476_supported_device_ids {

	ID_AD7466,

	ID_AD7467,

	ID_AD7468,

	ID_AD7495

};



static irqreturn_t ad7476_trigger_handler(int irq, void  *p)

{

	struct iio_poll_func *pf = p;

	struct iio_dev *indio_dev = pf->indio_dev;

	struct ad7476_state *st = iio_priv(indio_dev);

	s64 time_ns;

	int b_sent;



	b_sent = spi_sync(st->spi, &st->msg);

	if (b_sent < 0)

		goto done;



	time_ns = iio_get_time_ns();



	if (indio_dev->scan_timestamp)

		((s64 *)st->data)[1] = time_ns;



	iio_push_to_buffer(indio_dev->buffer, st->data);

done:

	iio_trigger_notify_done(indio_dev->trig);



	return IRQ_HANDLED;

}



static int ad7476_scan_direct(struct ad7476_state *st)

{
@@ -155,7 +209,8 @@ static int __devinit ad7476_probe(struct spi_device *spi) 
	spi_message_init(&st->msg);

	spi_message_add_tail(&st->xfer, &st->msg);



	ret = ad7476_register_ring_funcs_and_init(indio_dev);

	ret = iio_triggered_buffer_setup(indio_dev, NULL,

			&ad7476_trigger_handler, NULL);

	if (ret)

		goto error_disable_reg;
@@ -165,7 +220,7 @@ static int __devinit ad7476_probe(struct spi_device *spi) 
	return 0;



error_ring_unregister:

	ad7476_ring_cleanup(indio_dev);

	iio_triggered_buffer_cleanup(indio_dev);

error_disable_reg:

	regulator_disable(st->reg);

error_put_reg:
@@ -183,7 +238,7 @@ static int __devexit ad7476_remove(struct spi_device *spi) 
	struct ad7476_state *st = iio_priv(indio_dev);



	iio_device_unregister(indio_dev);

	ad7476_ring_cleanup(indio_dev);

	iio_triggered_buffer_cleanup(indio_dev);

	regulator_disable(st->reg);

	regulator_put(st->reg);

	iio_device_free(indio_dev);

drivers/staging/iio/adc/ad7476.h

deleted100644 → 0
+0 −56
Original line number Diff line number Diff line 
/*

 * AD7476/5/7/8 (A) SPI ADC driver

 *

 * Copyright 2010 Analog Devices Inc.

 *

 * Licensed under the GPL-2 or later.

 */

#ifndef IIO_ADC_AD7476_H_

#define IIO_ADC_AD7476_H_



#define RES_MASK(bits)	((1 << (bits)) - 1)



struct ad7476_chip_info {

	unsigned int			int_vref_uv;

	struct iio_chan_spec		channel[2];

};



struct ad7476_state {

	struct spi_device		*spi;

	const struct ad7476_chip_info	*chip_info;

	struct regulator		*reg;

	struct spi_transfer		xfer;

	struct spi_message		msg;

	/*

	 * DMA (thus cache coherency maintenance) requires the

	 * transfer buffers to live in their own cache lines.

	 * Make the buffer large enough for one 16 bit sample and one 64 bit

	 * aligned 64 bit timestamp.

	 */

	unsigned char data[ALIGN(2, sizeof(s64)) + sizeof(s64)]

			____cacheline_aligned;

};



enum ad7476_supported_device_ids {

	ID_AD7466,

	ID_AD7467,

	ID_AD7468,

	ID_AD7495

};



#ifdef CONFIG_IIO_BUFFER

int ad7476_register_ring_funcs_and_init(struct iio_dev *indio_dev);

void ad7476_ring_cleanup(struct iio_dev *indio_dev);

#else /* CONFIG_IIO_BUFFER */



static inline int

ad7476_register_ring_funcs_and_init(struct iio_dev *indio_dev)

{

	return 0;

}



static inline void ad7476_ring_cleanup(struct iio_dev *indio_dev)

{

}

#endif /* CONFIG_IIO_BUFFER */

#endif /* IIO_ADC_AD7476_H_ */

drivers/staging/iio/adc/ad7476_ring.c

deleted100644 → 0
+0 −56
Original line number Diff line number Diff line 
/*

 * Copyright 2010-2012 Analog Devices Inc.

 * Copyright (C) 2008 Jonathan Cameron

 *

 * Licensed under the GPL-2 or later.

 *

 * ad7476_ring.c

 */



#include <linux/interrupt.h>

#include <linux/device.h>

#include <linux/kernel.h>

#include <linux/slab.h>

#include <linux/spi/spi.h>



#include <linux/iio/iio.h>

#include <linux/iio/buffer.h>

#include <linux/iio/trigger_consumer.h>

#include <linux/iio/triggered_buffer.h>



#include "ad7476.h"



static irqreturn_t ad7476_trigger_handler(int irq, void  *p)

{

	struct iio_poll_func *pf = p;

	struct iio_dev *indio_dev = pf->indio_dev;

	struct ad7476_state *st = iio_priv(indio_dev);

	s64 time_ns;

	int b_sent;



	b_sent = spi_sync(st->spi, &st->msg);

	if (b_sent < 0)

		goto done;



	time_ns = iio_get_time_ns();



	if (indio_dev->scan_timestamp)

		((s64 *)st->data)[1] = time_ns;



	iio_push_to_buffer(indio_dev->buffer, st->data);

done:

	iio_trigger_notify_done(indio_dev->trig);



	return IRQ_HANDLED;

}



int ad7476_register_ring_funcs_and_init(struct iio_dev *indio_dev)

{

	return iio_triggered_buffer_setup(indio_dev, NULL,

			&ad7476_trigger_handler, NULL);

}



void ad7476_ring_cleanup(struct iio_dev *indio_dev)

{

	iio_triggered_buffer_cleanup(indio_dev);

}

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